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发明名称
摘要
申请公布号
JPH0165400(U)
申请公布日期
1989.04.26
申请号
JP19870160834U
申请日期
1987.10.22
申请人
发明人
分类号
E21D11/14;(IPC1-7):E21D11/14
主分类号
E21D11/14
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代理人
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地址
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